Construction forms



Juhe 30, 1959 R. E. BUDD CONSTRUCTION FORMS 5 Sheets-Sheet 1 Filed April 15. 1957 INVENTOR. Robert E.Bud d ATTORNEYS.

June 30, 1959 R. E. BUDD CONSTRUCTION FORMS Filed April 15. 1957 5 Sheets-Sheet 2 INVEJVT'OR. Robert E. Budd.

BY 2 W fl np/fif ATTORNEYS June'30, 1959 Filed April 15, 1957 R. E. BUDD CONSTRUCTION FORMS 5 Sheets-Sheet 3 INVENTOR. Robert E. B dd,

' ATTORNEYS.

June 30, 1959 R. E. BUDD I 2,892,238

CONSTRUCTION FORMS Filed April 15, 1957 5 Sheets-Sheet 4 ATTORNEYS.

t INVENTOR.

Robert E. Budd.

5 Sheets-Sheet 5 INVENTOR.

ATTORNEYS.

June 30, 1959 R. E. BUDD CONSTRUCTION FORMS Filed April 15, 1957 Robert E. Budd.

on wm A4 hm], nn L Unitecl States Patent CONSTRUCTION FORMS Robert E. Budd, Lawrence, Kane, ,assjgnor to The Lawrence ape any, Law n e, a nra inn of Kansas ppl cat on Ap 95 Serial No- 6 3 Claims. ((125-1315) This invention relates to construction forms for the pouring of plastic materials, and more particularly to a novel structure of domes, pans or like forms for use in the formation of concrete structures such as concrete floors with beams and the like.

In building construction requiring the pouring of concrete and like plastic materials, it is necessary to provide forms to support and shape the poured material until it has set sufliciently for the forms to be removed. The forms heretofore employed have had certain disadvantages. Some forms known to the tradeas ipans formed of sheet metal are heavy, expensive, and on completion of a particular job require expensive cleaning and reconditioning. Also, the transportation of such prefabricated forms have been expensive and .di-fiicult due to the size and heavy materials necessary to withstandthe rough handling in use and reuse. :Some collapsible and portable forms have been .used but when made vof'lightweight disposable material the forms had insufficient strength to support the loads applied thereto, particularly when the material was subject to loss of strength in moist conditions.

The principal objects of the presentinvention are-to provide a construction form made from corrugated paperboard in a manner and shape that overcomes the above dilficulties and others not specifically mentioned; to .provide such a construction form having a dome- .or pan- Shaped member with removable reinforcing =inter.-engaging beams or truss members that rare -.U.-shaped in crosssecr tion extending longitudinally and transverselythereof; to provide such construction forms uzvherein the pans ..0r dome memhers and reinforcing members are-formed from sheets .of suitable corrugated paperboardhaving asphalt or bituminous impregnated layers .or plie'sth'erein; to provide such aconstruction form wherein 1116 reinforcing partitions or cores are removable for reuse in otherrpan or dom -like form members; to provide sucha construe ti fo m h vin pl r li y of pan .orshell members n n to n abutti ngagementwith removable reino ci i te n a ed pantit' erein spacers do:

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that obj cts Q rth inr se for use or reuse at the const r In c mpli hin th se invention, 1 v r nvided inihnnr d detai e st u ture- 2,8922% Patented June 3Q, 195? 2 Fig. 4 is a disassembled perspective view showing parts of the construction form. l i

Fig. 5 is a partial perspective view of an assembled reinforcing core for the construction form. 3

Fig. 6 is a partial perspective view of a construction form'sho'wing a modified form of core spacer therein;

Fig. 7 is a partial perspective view of a construction form with portions broken away showing'a further mqdi fied spacer structure.

Fig. 8 is a perspective view of a modified form of the construction form embodied in a single pan type form with portions broken away to show the reinforcing therein. 1

Fig. 9 is a longitudinal sectional view through the modified form of construction form taken on the line 9+9, Fig. 8. V

Fig. 10 is a transverse sectional view through the modified form of construction form taken on the line 10 4i),

Fig. 8. 7'

Fig. 11 is a perspective view of the reinforcing core used in said modified form in assembled condition.

the p eferre r im of h c ar i st ate in the ac.-

companying drawings, wherein: I a

Fi is a pe p ct v ew .n a .iiln al tyc co st uci forms erected f r he u n s laseneret br fl o structure wi p r ion ro n awa to sh w the reinforcing in :the forms.

2 is a er i manure se o a iew th ou h a construction form embodying the features of the. present invention.

Fig. 3 is a vertical transverse sectional View through Referring more in detail to the drawings:

1 designates a construction form as a whole for the laying or pouring of'plastic material such as concrete 2 of a building structure. In the assemblage illustrated in Fig. 1, a plurality of forms 3 are arranged for pouring of a ribbed floor having a slab 4 with ribs, beams or girders 5 depending therefrom. There is a supporting structure 6 -of temporary nature consisting of shoring or other false work (not shown) arranged to support a plurality of support top members orform bottom boards 7 preferably arranged in spaced connected relation whereby abottom board will be arranged under each-of the rib or beam forming portions.

a The forms 3 each includes the main form or shell member Slof pan or dome-shaped structure 'having att'op flat wall 9 which may be square or rectangularas do sired with depending marginal side walls 10 on opposite or longitudinal edges of the top wall 9. The 'sideiwalls terminate at .their lower ends in laterallyextending fianges 11 adapted to rest on the respective bottom board 7 and be suitably secured thereto as by fastening devices such as staples 12. Y

The main form members 8 are preferably made from a sheet of suitable corrugated paperboard such-as doublefaced corrugated paperboard having asphalt or bituminous impregnated layers or .plies therein'.or other' waterrresistant paperboard such-as sulphur board orlt-he like whereby the board is characterized by tbeihgwater'- resistant and having substantial strengthiwhen as tfor example, a paperboard'produced by the method disclosed in the Hilsllet-aL, :Patent No. 2,767,091, issued 20ctober 1.6, 1956. The respective m'a'in forms 8. are arranged on the bottom Eboards or support, tops whereby adjacent .sidelwalls of the plurality of forms define' a space correspondingto .the size and shape incross sec-i tion of thelribs ,or'floor .beams 5.

In the structure illustrated in Figs; 1 to 5 inclusive, -the main form onpan members 8 rhavelopen ends 13 whereby said forms ,may be used individually with the ends suit ably .closed, or a plurality of saidma'iii forms: may he used in aligiim'entwith adjacent .end edges 14 inia butt iiig engagement :as' iillustratedlin :Fig. :1. ':Reinforcing core members 1-5 are removably mounted underthe re ent 9.2and [between the side walls 10 of the respective main forms :8. The core .rnembers 15 include longitudinal trussorsbeam structures 16 having-a'fiattop wall 17 substantially coextensive in length with tl e t'optwall :9 bfithe respective mainform or panmembensaid wall L7 being of less-.width than .the top wall ;9Iand havingdepending sidewalls 18 at .theopposed side edgesarrangedrinspaced elat onto the ide wall tltlcf he main form, said-Malls- 3 18 terminating in bottom edges 19 substantially in the plane of the upper surface 20 of the bottom boards 7 when the wall 17 is engaged with the under surface of the top wall 9 of the main form. The walls 18 are coextensive in length with the wall 17 of said longitudinal core truss member 16. The side walls 18 of the truss member are provided with spaced pairs of slots 21 which ex= tend upwardly from the bottom edge 19 for a distance slightly more than one-half the heighth of the walls 18, the slots of each pair being parallel and perpendicular to the plane of the top surface 20 of the bottom boards 7.

Transverse beam or truss-like reinforcing members 22 are provided with bottom walls 23 each terminating at its side edges in upturned walls 24 having a heighth corresponding to the heighth of the walls 18. The walls 24 are of a length whereby the end edges 25 thereof will engage the inner surfaces of the side walls of the main to the spacing between the walls 18 of the longitudinal truss member 16. In the structure illustrated in Figs. 1 and 4, the spacers have walls 30 terminating in laterally turned walls 31 and inwardly turned walls 32 to define the top, bottom and side walls of the spacer. The end portions of the wall members 32 are turned to form a double thickness partition 33 with outwardly turned flanges 34 suitably secured to the walls 30 to form a strong, substantially rigid spacer.

The ends of the series of forms are closed to define the end of the cavity in the finished concrete, and the sides of beams or the like that extend transversely relative to the beams or ribs 5. In the structure illustrated form and the spacing of the Walls 24 of the respective transverse truss members 22 correspond to the spacing of the slots 21 of each pair thereof. The transverse truss members 22 have slots 26 extending downwardly from the top edges 27 of the Walls 24 for a distance slightly greater than one-half the heighth of the walls 24, the slots 26 being arranged to align with the walls 18 when the end edges 25 of the transverse truss members engage the inner surface of the side walls 10 of the main form whereby the slots 21 and 26 are aligned and the longitudinal and transverse truss members engaged at the respective slots as illustrated in Fig. 5. The truss members 16 and 22 are each preferably formed from a sheet of suitable corrugated paperboard such as described for the main form members 8. The slots 21 and 26 are substantially of a width corresponding to the thickness of the corrugated board whereby when the longitudinal and transverse reinforcing truss members are assembled, there is an inter-engagement providing substantial rigidity and when located in the main form the end portions of the transverse truss members rest on the upper surfaces of the bottom boards 20, and the upper surfaces 27 of the walls 24 between the slots 26 engage the under surface of the top wall 17 of the longitudinal truss member, and the bottom edges 19 of the walls 18 between the pairs of slots 21 engage the upper surface of the bottom wall 23 of the transverse truss members providing substantial support and rigidity to the structure.

The transverse truss members of each core are of sufficient quantity and spacing to provide adequate support to the side walls 10 of the form. Also the corrugations may extend longitudinally instead of transversely in some of the truss members to provide strength in directions and places where desirable to resist pressures, the directions of the corrugations being toward the areas of greater pressures.

It is preferred that the side walls 18 of the longitudinal truss members be positioned over the inner edges of the bottom boards 7 as illustrated in Figs. 1 and 3. However, the reinforcing core structure is of adequate strength whereby the transverse truss members will support the longitudinal truss members if the spacing between the bottom boards is greater than the spacing between the walls 18 of the respective core member.

When a plurality of main forms are aligned in abutting engagement, the core members are arranged therein with the longitudinal truss members having the end edges 28 in abutting engagement, and in the form illustrated in Figs. 1 to 4 inclusive spacers 29 are arranged in the ends of the longitudinal truss members to support same. The spacer members are preferably formed from a sheet of the same paperboard as used in the other form members and is bent to provide a tube-like structure having a heighth substantially corresponding to the heighth of the walls 18 and a 'width corresponding to the spacing be tween the end edges 28 of the longitudinal truss member and the adjacent wall 24 of the endmost transverse truss member 22, the length of the tube spacer corresponding in Fig. 1, the end closure consists of an end wall 35 having a top flange 36 extending under the top wall 9 of the end of the endmost main form. The end wall 35 also has a flange 37 at its lower end suitably secured as by staples 38 to the respective bottom board 7. The end wall 35 is arranged to close and align with the end edges of said endmost main form and a spacer 29 is arranged between the end wall 35 and the adjacent wall 24 of the endmost transverse truss member 22. When a plurality of supporting structures and forms are assembled and arranged as described, suitable reinforcing rods 39 are arranged relative to the forms and the concrete poured thereover. After the concrete has sufiiciently set, the supporting timbers and bottom boards are removed and the cores are then removed. The reuse of the main forms may be inadvisable due to injury by the first service to the fit, strength or surface thereof. The core members and spacers may be removed and used in other main form or pan members. The outer surface of the main form 8 may be provided with a coating 8' of wax or the like to facilitate separation of the form from the concrete. Also, various liner sheets 39' may be used between the main form 8 and the concrete. A wax coated single-face corrugated liner used between the main form and concrete with the corrugated portion exteriorly of said liner will provide a fluted or indented surface on the concrete and also protect the main form for reuse. The liner sheets 39 may be uncoated to adhere to the concrete and may be of various materials and finishes to provide desired finishes to the under surface of the structure. The main forms may have the exterior surface uncoated to adhere to the concrete and be left in place to provide a special insulating sheet on the concrete. Such main forms may also be of multiple thickness and left in place to add insulation and sound deadening.

In the structure illustrated in Fig. 6, the main forms and longitudinal and transverse truss members are the same as described relative to the form illustrated in Figs. 1 to 5 inclusive. The spacer 40, however, is made from two strips 41 of the same corrugated board and provided with slots 42 which extend slightly more than one-half the width of the strips whereby the slotted portions of the strips are engaged to make a substantially X-shaped member with the edges 43 of said strips lying in the same plane, the width of the strips or reinforcing members substantially corresponding to the distance from the edge of the longitudinal truss member 16 to the adjacent side of the endmost transverse truss member 24. The spacer 40 is used in the same manner as the spacer members 29.

In the form of the invention illustrated in Fig. 7, the main form or shell 8 and transverse truss members 29 are constructed in the same manner as illustrated and described relative to the structure shown in Figs. 1 to 5 inclusive, with the exception of the endmost truss member 44 extending transversely of the structure and the longitudinal truss member 45. The longitudinal truss member is the same relative to the top 17 thereof but the sides 46 of said longitudinal truss member have the slots 47 the longitudinal truss member 45 whereby the spacers such as 29 and 40 are eliminated. The use of the structure shown and described relative to Fig. 7 is substantially the same as described in connection with the structure shown in Figs. 1 to 5 inclusive.

In the structure illustrated in Figs. 8 to 11 inclusive, the main form or shell 49 is of box-like structure having a top wall 50, side walls 51 and end walls 52, each provided withoutwardly extending flanges 53 on the lower edges of said side and end walls adapted to be secured to the bottom boards 7 of the supports. The member 49 is preferably formed from a single sheet ofsuitable corrugated board such as describedirelative to the .main forms 8. A core 54 is arranged in the box or domeshaped form and'consists of one or more longitudinal truss members 55, the illustrated structure showing two spaced longitudinal truss members each having top walls 56 and depending side members 57 arranged parallel to the side walls 51 of the box structure. A plurality of transverse truss members 58 each having bottom walls 59 and upwardly extending walls 60 forming U-shaped members are arranged to cooperate with the U-shaped members of the longitudinal truss members, the side walls of the longitudinal truss members and the upwardly extending Walls of the transverse truss members each having slots therein for inter-engagement of the truss members with one side wall 61 of the endmost transverse truss member engaging the end edges 62 of the longitudinal truss members as illustrated in Fig. 9. When the form illustrated in Figs. 8 to 11 is assembled, the end portions of the transverse t111ss members rest on the tops of the bottom boards 7 and the upper edges of the side walls of the transverse truss members and top walls of the longitudinal truss members engage the top wall 50 of the box or shell form. The end edges of the transverse truss members engage the interior of the side walls 51 and the endmost side walls 60 of the endmost transverse truss members engage the interior of the end walls 52 of the box or shell form member 49 providing substantial reinforcement and bracing to all of the walls of the form. The truss members 55 and 58 of the core are preferably formed from sheets of the same corrugated board as the box or shell form.

When the pouring of the concrete is completed, and the supports removed, the cores are removed from the interior of the shell or box form 49 and may be reused again in other box or dome forms. If desired, each of the structures may be arranged whereby the ends of the transverse truss members may have downward inclination and the side walls of the box or shell form may also be inclined downwardly and outwardly to facilitate removal of the forms from the (set concrete.

It is to be understood that while I have illustrated and described certain forms of my invention, it is not to be limited to the specific forms or arrangement of parts herein described and shown except insofar as such limitations are included in the claims.

What I claim and desire to secure by Letters Patent is:

1. A building construction form of corrugated paper board for use in pouringribbed concrete floors comprising, a main form having a shell, said shell having spaced opposed side walls and spaced opposed end walls and a top wall connected to the side and end walls, flanges on the side and end walls and extending therefrom in spaced relation to the top wall, a plurality of spaced pairs of upright partitions extending transversely of the main form with end edges of the partitions engaging the side walls of said shell for substantially the entire height thereof, each of said pairs of partitions having a wall connected to adjacent edges thereof and cooperating therewith to form a beam member of substantially U-shaped cross section, a pair of spaced partitions extending longitudinal- 1y relative to the side walls of the shell and arranged in laterally spaced relation to said side walls with end edges of the longitudinal partitions engaging the end walls of said shell for substantially the entire height thereof, and a wall connecting adjacent edges of said pair of longitugamma more than one-half the height of said partitions whereby the slotted portions of said longitudinal partitions have substantially nesting engagement with the slotted portions, of the transverse partitions with free edges of the longitudinal partitions engaging the connecting walls of the transverse partitions and free edges of the transverse partitions engaging the connecting walls of the longitudinal partitions to form a rigid reinforcement for the walls of the shell.

2. A building construction form for use in pouring ribbed concrete floors comprising, a main form having a shell formed from a sheet of double-face corrugated paper board having asphalt impregnated layers therein, said shell having spaced opposed side walls and spaced opposed end walls and a top wall connected to the side and end walls, flanges on the side and end walls and extending therefrom in spaced relation to the top wall, and a reinforcing core formed of double-face corrugated paper board having asphalt impregnated layers, said core having a plurality of beams of U-shaped cross section extending transversely of the main form with each of said beams folded from a sheet of paper board to define a connecting wall and a pair of partitions extending upwardly from side edges of said connecting wall and with end edges of said partitions engaging the side walls of the main form for substantially the entire height thereof, a longitudinal beam of substantially U-shaped cross section folded from a sheet of paper board to define a connecting wall with partitions extending downwardly from side edges of said connecting wall, said connecting wall of the longitudinal beam engaging the top wall of the main form and the longitudinal partitions extending longitudinally relative to the side walls of the main form and arranged in laterally spaced relation to said side walls, said longitudinal and transverse partitions being substantially coextensive in height and having cooperating slots extending slightly more than one-half the height of said partitions whereby the slotted portions of said longitudinal partitions have substantially nesting engagement with the slotted portions of the transverse partitions with free edges of the longitudinal partitions engaging the connecting walls of the transverse partitions and with free edges of the transverse partitions engaging the connecting walls of the longitudinal partitions to form a rigid removable reinforcement for the walls of the main form.

3. A building construction form of corrugated paper board for use in pouring ribbed concrete floors comprising, a plurality of main forms each having a shell, said shells each having spaced side walls and a cross top wall, said main forms lying in endwise abutting relation to one another, said side walls of the main forms having lower edges with laterally extending flanges thereon, a plurality of removable cores in the respective main forms and lying in endwise abutting relation whereby said removable cores have a combined length substantially coextensive with the combined length of the aligned main forms, end closing walls at the ends of a series of aligned main forms, said end closing walls having lower edges with flanges extending therefrom, said removable cores each including a plurality of spaced pairs of upright partitions extending transversely of the main forms and having end edges engaging the side walls of the main forms for substantially the entire height thereof, each of said pairs of partitions having lower edges connected by a wall to form substantially U-shaped beams, a pair of spaced upright partitions extending longitudinally relative to the side walls of the respective main form and arranged in laterally spaced relation to said side walls, said pair of longi- 7 w tudinal partitions having upper edges, and a wall con necting'the upper edges of said pair of longitudinal partitions to form a beam of substantially U-shaped cross,

titions with free edges of the longitudinal partitions en-- gaging the connecting Walls of the transverse partitions and with free edges of the transverse partitions engaging the connecting wall of the longitudinal partitions and the transverse beams supporting the longitudinal beams in a substantially-rigid reinforcing support to the walls ofthe main forms.

7 References Cited in the file this patent Paper-Form Is Water Resistant, page 65, Engineering:

UNITED STATES PATENTS Hayden Sept. 18, 1928' McDonald Dec. 27, 1932' Kieckhefer Nov. 23, 1937 Lacy et al May 9, 1944'- Baumann Dec. 7, 1954 OTHER REFERENCES 15 News-Record, April 4, 1957. 

